Unit 8 Natural Selection

What is natural selection?

• the better adapted organism survives and reproduces
• species could be wiped out by a single change to the environment.
• HUMANS interfere with breeding because they want certain traits in a organism like a dog, pig, corn
• Chronological collection of life's remains in sedimentary rock layers

Which of the following describes the importance of genetic variation to natural selection?

• It makes the species exactly the same
• Without genetic variation species could be wiped out by a single change to the environment
• Genetic variation is what helps organisms reproduce
• Genetic variation is what makes the organism the "fittest" and survives

What is Artificial selection (Selective Breeding)?

• Chronological collection of life's remains in sedimentary rock layers
• The better adapted organism survives and reproduces
• Without genetic variation species could be wiped out by a single change to the environment.
• HUMANS interfere with breeding because they want certain traits in a organism like a dog, pig, corn

What is extinction?

• DNA from parents that allows for survival
• A term that typically describes a species that no longer has any known living individuals.
• Chronological collection of life's remains in sedimentary rock layers
• HUMANS interfere with breeding because they want certain traits in a organism like a dog, pig, corn

What is a fossil record?

• Chronological collection of life's remains in sedimentary rock layers
• A term that typically describes a species that no longer has any known living individuals.
• The better adapted organism survives and reproduces
• A Trait (Wings, Thick Fur, Camouflage, Hibernation) that allows the animal to survive over time

Which is a Body fossil?

• Egg Shell
• Tooth
• Foot Print
• Nests

Which is a Trace fossil?

• Tooth
• Bone
• Snail shell
• Nests

What is a desired trait?

• DNA from parents that allows for survival
• The worse adapted organism survives and reproduces
• HUMANS interfere with breeding because they want certain traits in a organism like a dog, pig, corn
• A term that typically describes a species that no longer has any known living individuals.

Which best describes natural selection?

• Random assortment of genes results in better characteristics in the following generations
• Only the largest and strongest survive
• The best adapted individuals survive and reproduce, contributing the most to the next generation
• Some live and some die in each generation

What is mimicry?

• An adaptation that allows mammals to breathe under water
• An adaptation that allows species to blend with their surroundings
• An adaptation that allows one species to resemble another species
• An adaptation that allows bacteria to resist penicillin